/* =============================================
   吃瓜每日大赛 — 瓜界新浪潮设计系统
   Melon Nouveau Design Language
   ============================================= */

:root {
  --cream: #FFF8F2;
  --cream-deep: #F6EDE4;
  --coral: #FF5A4E;
  --coral-soft: #FF8A7A;
  --rind: #00A878;
  --rind-deep: #008A6A;
  --rind-soft: #E8FFF6;
  --gold: #FFB800;
  --seed: #2B2622;
  --white: #FFFFFF;
  --shadow-sm: 0 2px 12px rgba(43, 38, 34, 0.05);
  --shadow-md: 0 8px 28px rgba(43, 38, 34, 0.08);
  --shadow-lg: 0 16px 48px rgba(43, 38, 34, 0.12);
  --radius-sm: 12px;
  --radius-md: 24px;
  --radius-lg: 36px;
  --radius-pill: 100px;
  --ease: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background:
    radial-gradient(rgba(255, 90, 78, 0.035) 1.5px, transparent 2px),
    radial-gradient(rgba(0, 168, 120, 0.03) 1.5px, transparent 2px),
    var(--cream);
  background-size: 36px 36px, 24px 24px, 100% 100%;
  color: var(--seed);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--coral);
  color: var(--white);
}

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--cream); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--coral), var(--rind));
  border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--coral);
}

/* ============ 核心布局 ============ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 2;
}

.section {
  padding: 96px 0;
  position: relative;
}

.section:nth-child(even) {
  background: linear-gradient(180deg, var(--rind-soft), #F2FFF9);
}

.section::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 68px;
  height: 6px;
  border-radius: 0 0 8px 8px;
  background: linear-gradient(90deg, var(--coral), var(--gold), var(--rind));
  z-index: 3;
}

/* ============ 固定导航 ============ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 248, 242, 0.86);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-bottom: 1px solid rgba(255, 90, 78, 0.1);
  transition: box-shadow var(--ease);
}

.site-header:hover {
  box-shadow: 0 8px 32px rgba(255, 90, 78, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  font-size: 1.3rem;
  text-decoration: none;
  color: var(--seed);
  letter-spacing: -0.02em;
  transition: color var(--ease);
  position: relative;
  z-index: 2;
}

.logo:hover {
  color: var(--coral);
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  background:
    radial-gradient(circle at 30% 28%, rgba(43, 38, 34, 0.9) 0 2.5px, transparent 3.5px),
    radial-gradient(circle at 68% 38%, rgba(43, 38, 34, 0.9) 0 2.5px, transparent 3.5px),
    radial-gradient(circle at 42% 66%, rgba(43, 38, 34, 0.9) 0 2.5px, transparent 3.5px),
    var(--coral);
  border: 4px solid var(--rind);
  box-shadow: inset 0 0 0 2px var(--cream), 0 4px 12px rgba(255, 90, 78, 0.3);
  transition: transform var(--ease);
}

.logo:hover .logo-icon {
  transform: rotate(30deg) scale(1.05);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--seed);
  opacity: 0.72;
  position: relative;
  padding: 6px 4px;
  transition: opacity var(--ease), color var(--ease);
  letter-spacing: 0.02em;
}

.main-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 100%;
  height: 2px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--coral), var(--gold));
  transition: transform var(--ease);
  transform-origin: center;
}

.main-nav a:not(.nav-cta):hover::after {
  transform: translateX(-50%) scaleX(1);
}

.main-nav a:not(.nav-cta):hover {
  opacity: 1;
  color: var(--coral);
}

.nav-cta {
  padding: 9px 22px;
  border-radius: var(--radius-pill);
  color: var(--white) !important;
  font-weight: 700;
  opacity: 1 !important;
  background: linear-gradient(135deg, var(--coral), var(--coral-soft));
  box-shadow: 0 4px 16px rgba(255, 90, 78, 0.28);
  transition: transform var(--ease), box-shadow var(--ease) !important;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 90, 78, 0.38) !important;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  width: 40px;
  height: 40px;
  border: none;
  background: var(--rind-soft);
  color: var(--rind);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--ease), transform var(--ease);
}

.menu-toggle:hover {
  background: var(--rind);
  color: var(--white);
}

/* ============ 首页 Hero 区 ============ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  padding: calc(72px + 56px) 0 72px;
  position: relative;
  background: linear-gradient(135deg, var(--cream) 0%, #FFEFE3 42%, var(--rind-soft) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -120px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 184, 0, 0.12), transparent 70%);
  z-index: 0;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -160px;
  left: -100px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 168, 120, 0.1), transparent 70%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
  flex: 1;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 7px 20px;
  border-radius: var(--radius-pill);
  margin-bottom: 20px;
  background: linear-gradient(90deg, var(--rind), var(--rind-deep));
  color: var(--white);
  letter-spacing: 0.06em;
  box-shadow: 0 4px 16px rgba(0, 168, 120, 0.22);
  text-transform: uppercase;
}

.hero-eyebrow::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
  animation: pulse 1.6s ease-in-out infinite;
}

.hero h1 {
  font-size: clamp(2.8rem, 5.5vw, 4.4rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: var(--seed);
  position: relative;
}

.hero h1 .text-accent {
  color: var(--coral);
  position: relative;
  white-space: nowrap;
}

.hero h1 .text-accent::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0.08em;
  width: 100%;
  height: 0.24em;
  background: linear-gradient(90deg, rgba(255, 184, 0, 0.45), rgba(255, 90, 78, 0.25));
  border-radius: 4px;
  z-index: -1;
}

.hero p {
  font-size: 1.12rem;
  opacity: 0.66;
  line-height: 1.85;
  max-width: 540px;
  margin-bottom: 36px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
  z-index: 2;
  width: 340px;
  height: 340px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 16px solid var(--rind);
  box-shadow:
    inset 0 0 0 5px var(--cream),
    0 24px 48px rgba(0, 168, 120, 0.2),
    0 8px 24px rgba(255, 90, 78, 0.12);
  background:
    radial-gradient(circle at 22% 20%, rgba(43, 38, 34, 0.92) 0 4px, transparent 5px),
    radial-gradient(circle at 68% 22%, rgba(43, 38, 34, 0.92) 0 4px, transparent 5px),
    radial-gradient(circle at 38% 42%, rgba(43, 38, 34, 0.92) 0 4px, transparent 5px),
    radial-gradient(circle at 76% 48%, rgba(43, 38, 34, 0.92) 0 4px, transparent 5px),
    radial-gradient(circle at 24% 62%, rgba(43, 38, 34, 0.92) 0 4px, transparent 5px),
    radial-gradient(circle at 54% 78%, rgba(43, 38, 34, 0.92) 0 4px, transparent 5px),
    radial-gradient(circle at 80% 72%, rgba(43, 38, 34, 0.92) 0 4px, transparent 5px),
    linear-gradient(145deg, #FF6B5E, #F04A3E);
  overflow: hidden;
  animation: floatMelon 6s ease-in-out infinite;
}

.hero-image:hover {
  animation-play-state: paused;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: relative;
  z-index: -1;
}

/* ============ 按钮 ============ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all var(--ease);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.18), transparent);
  transition: left 0.6s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--coral), var(--coral-soft));
  color: var(--white);
  box-shadow: 0 8px 24px rgba(255, 90, 78, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(255, 90, 78, 0.38);
}

.btn-primary:active {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(255, 90, 78, 0.28);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--rind);
  color: var(--rind);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--rind);
  color: var(--white);
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(0, 168, 120, 0.24);
}

/* ============ 标签 / 标题 ============ */

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 3px;
  margin-bottom: 14px;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  background: var(--rind-soft);
  color: var(--rind);
  text-transform: uppercase;
}

.section-label::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--coral);
  box-shadow: 0 0 0 3px rgba(255, 90, 78, 0.18);
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -0.015em;
  margin-bottom: 16px;
  color: var(--seed);
  line-height: 1.2;
  position: relative;
}

.section-desc {
  max-width: 640px;
  opacity: 0.62;
  font-size: 1.02rem;
  line-height: 1.85;
  margin-bottom: 48px;
}

/* ============ 卡片网格 ============ */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.category-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: all var(--ease);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.category-card::before {
  content: '';
  position: absolute;
  top: -48px;
  right: -48px;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 90, 78, 0.08), transparent 70%);
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 0;
}

.category-card:hover::before {
  transform: scale(2.2);
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 90, 78, 0.08);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
  color: var(--white);
  background: linear-gradient(135deg, var(--coral), var(--coral-soft));
  box-shadow: 0 6px 16px rgba(255, 90, 78, 0.24);
  position: relative;
  z-index: 1;
  transition: transform var(--ease);
}

.category-card:nth-child(2n) .card-icon {
  background: linear-gradient(135deg, var(--rind), var(--rind-deep));
  box-shadow: 0 6px 16px rgba(0, 168, 120, 0.24);
}

.category-card:nth-child(3n) .card-icon {
  background: linear-gradient(135deg, var(--gold), #FFD257);
  box-shadow: 0 6px 16px rgba(255, 184, 0, 0.28);
  color: var(--seed);
}

.category-card:hover .card-icon {
  transform: rotate(-12deg) scale(1.08);
}

.card-link {
  font-weight: 700;
  font-size: 0.88rem;
  text-decoration: none;
  color: var(--coral);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  position: relative;
  margin-top: 8px;
}

.card-link::after {
  content: '→';
  display: inline-block;
  transition: transform var(--ease);
}

.category-card:hover .card-link::after {
  transform: translateX(5px);
}

/* ============ 特性块 ============ */

.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-image {
  border-radius: 38% 62% 58% 42% / 45% 42% 58% 55%;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
  animation: morphShape 8s ease-in-out infinite alternate;
}

.feature-image::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255, 90, 78, 0.12), rgba(0, 168, 120, 0.12));
  pointer-events: none;
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.feature-text {
  padding: 12px 0;
}

.feature-list {
  list-style: none;
  margin-top: 8px;
}

.feature-list li {
  padding: 12px 0;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.98rem;
  border-bottom: 1px dashed rgba(0, 0, 0, 0.08);
  transition: padding-left var(--ease);
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list li:hover {
  padding-left: 8px;
}

.feature-list li::before {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--rind);
  flex-shrink: 0;
  box-shadow: 0 0 0 3px rgba(0, 168, 120, 0.14);
}

/* ============ 数据条 ============ */

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}

.stat-item {
  padding: 36px 24px;
  border-radius: var(--radius-md);
  background: var(--white);
  border: 1px solid rgba(0, 0, 0, 0.04);
  box-shadow: var(--shadow-sm);
  transition: transform var(--ease), box-shadow var(--ease);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 4px;
  border-radius: 0 0 8px 8px;
  background: linear-gradient(90deg, var(--coral), var(--gold), var(--rind));
  transition: width var(--ease);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-item:hover::before {
  width: 100%;
}

.stat-number {
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--coral), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.92rem;
  opacity: 0.55;
  margin-top: 8px;
  font-weight: 600;
}

/* ============ 内容墙 ============ */

.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: all var(--ease);
  box-shadow: var(--shadow-sm);
}

.content-wall-item:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: var(--shadow-lg);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.content-wall-item:hover img {
  transform: scale(1.05);
}

.content-wall-body {
  padding: 24px;
  position: relative;
}

.content-wall-body::after {
  content: '🍉';
  position: absolute;
  bottom: 16px;
  right: 18px;
  font-size: 1rem;
  opacity: 0;
  transform: rotate(30deg) scale(0);
  transition: all var(--ease);
}

.content-wall-item:hover .content-wall-body::after {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* ============ FAQ ============ */

.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--white);
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 18px;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: all var(--ease);
  box-shadow: var(--shadow-sm);
}

.faq-item:hover {
  border-color: rgba(255, 90, 78, 0.16);
}

.faq-item.open {
  border-color: rgba(255, 90, 78, 0.22);
  box-shadow: 0 8px 24px rgba(255, 90, 78, 0.1);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1.02rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: var(--seed);
  transition: color var(--ease);
}

.faq-item .faq-question::after {
  content: '';
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--rind-soft);
  position: relative;
  transition: background var(--ease), transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
  border: 2px solid var(--rind);
}

.faq-item .faq-question::before {
  content: '+';
  position: absolute;
  right: 0;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--rind);
  z-index: 1;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 1;
}

.faq-item .faq-question {
  position: relative;
}

.faq-item.open .faq-question::before {
  transform: rotate(135deg);
}

.faq-item.open .faq-question::after {
  background: var(--rind);
  border-color: var(--rind);
}

.faq-item.open .faq-question::before {
  color: var(--white);
}

.faq-item .faq-answer {
  padding: 0 28px 20px;
  display: none;
  opacity: 0.65;
  line-height: 1.85;
  font-size: 0.95rem;
  border-top: 1px dashed rgba(0, 0, 0, 0.06);
  animation: fadeIn 0.4s ease;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ============ CTA 横幅 ============ */

.cta-banner {
  padding: 72px 48px;
  text-align: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--coral) 0%, #FF6B78 55%, var(--coral-soft) 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(255, 90, 78, 0.28);
}

.cta-banner::before,
.cta-banner::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.cta-banner::before {
  width: 220px;
  height: 220px;
  top: -90px;
  right: -60px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.12), transparent 70%);
}

.cta-banner::after {
  width: 130px;
  height: 130px;
  bottom: -50px;
  left: -40px;
  border: 18px solid rgba(255, 255, 255, 0.14);
}

.cta-banner h2 {
  color: var(--white);
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
}

.cta-banner p {
  position: relative;
  z-index: 2;
  opacity: 0.88;
  margin-bottom: 28px;
  font-size: 1.06rem;
}

.cta-banner .btn-primary {
  background: var(--white);
  color: var(--coral);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.16);
}

/* ============ 页脚 ============ */

.site-footer {
  padding: 72px 0 32px;
  margin-top: 96px;
  background: linear-gradient(180deg, var(--rind) 0%, var(--rind-deep) 100%);
  color: rgba(255, 248, 242, 0.92);
  border-radius: 48px 48px 0 0;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  bottom: -80px;
  right: -80px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 24px solid rgba(255, 255, 255, 0.05);
}

.site-footer .container {
  position: relative;
  z-index: 2;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand .logo {
  color: var(--white);
  margin-bottom: 16px;
}

.footer-brand .logo-icon {
  border-color: var(--gold);
  animation: pulseGlow 3s ease-in-out infinite;
}

.footer-brand p {
  opacity: 0.68;
  font-size: 0.92rem;
  line-height: 1.8;
  max-width: 300px;
  margin-top: 8px;
}

.footer-col h4 {
  color: var(--white);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: 0.04em;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 22px;
  height: 2px;
  border-radius: 4px;
  background: var(--gold);
}

.footer-col a {
  display: block;
  padding: 4px 0;
  color: rgba(255, 248, 242, 0.65);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--ease), transform var(--ease);
}

.footer-col a:hover {
  color: var(--gold);
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.55;
}

/* ============ 工具类 ============ */

.text-accent {
  color: var(--coral);
  font-weight: 800;
}

.text-center {
  text-align: center;
}

.seo-description {
  max-width: 640px;
  margin: 0 auto 48px;
  opacity: 0.62;
  font-size: 1rem;
  line-height: 1.8;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* ============ 动画 ============ */

@keyframes floatMelon {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-18px) rotate(2deg);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(0.85);
  }
}

@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(255, 184, 0, 0.4), inset 0 0 0 2px var(--cream);
    border-color: var(--gold);
  }
  50% {
    box-shadow: 0 0 0 10px rgba(255, 184, 0, 0), inset 0 0 0 2px var(--cream);
    border-color: var(--gold);
  }
}

@keyframes morphShape {
  0% {
    border-radius: 38% 62% 58% 42% / 45% 42% 58% 55%;
  }
  100% {
    border-radius: 55% 45% 42% 58% / 52% 58% 42% 48%;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ 响应式 ============ */

@media (max-width: 992px) {
  .hero {
    flex-direction: column;
    justify-content: center;
    text-align: center;
    padding: 140px 0 72px;
  }

  .hero-content {
    max-width: 100%;
    margin-bottom: 48px;
  }

  .hero p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-image {
    width: 280px;
    height: 280px;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .section {
    padding: 72px 0;
  }

  .header-inner {
    padding: 0 20px;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .stat-item {
    padding: 24px 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 20px;
    right: 20px;
    width: auto;
    background: var(--white);
    padding: 28px;
    border-radius: 20px;
    box-shadow: 0 20px 48px rgba(43, 38, 34, 0.14);
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a:not(.nav-cta) {
    padding: 14px 8px;
    border-bottom: 1px dashed rgba(0, 0, 0, 0.08);
    opacity: 0.85;
  }

  .main-nav a:not(.nav-cta)::after {
    display: none;
  }

  .nav-cta {
    margin-top: 12px;
    text-align: center;
    padding: 14px 22px;
  }

  .menu-toggle {
    display: flex;
  }

  .hero {
    min-height: auto;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

  .hero-image {
    width: 220px;
    height: 220px;
    border-width: 12px;
  }

  .list-inline {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .cta-banner {
    padding: 48px 24px;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .logo {
    font-size: 1.1rem;
  }

  .logo-icon {
    width: 32px;
    height: 32px;
    border-width: 3px;
  }

  .site-footer {
    border-radius: 32px 32px 0 0;
    padding: 56px 0 24px;
  }

  .stat-number {
    font-size: 1.8rem;
  }
}